A letter to this effect from Jayalalithaa to Manmohan Singh dated Septmber 3 was released to the media in Chennai on Wednesday.

Referring to the advertisements issued recently by a Karnataka company, Jayalalithaa said, "Under the circumstances, I request you to intervene in the matter and advise the government of Karnataka and its Cauvery Neeravari Nigama Limited (CNNL) not to proceed with any projects in the Cauvery basin till the Cauvery Management Board is formed."

The Cauvery Neeravari Nigama, a Karnataka government undertaking, issued newspaper advertisements inviting expression of interest for restoration and rejuvenation of the Arkavathy River and for modernization of the Hemavathy canals. She said that Karnataka may be instructed to advise the CNNL to withhold the invitation for expression of interest called by it for two projects.

Jayalalithaa said that the rejuvenation of the Arkavathy River and remodeling of the Hemavathy canals are new schemes not contemplated in the final order of the Cauvery Water Disputes Tribunal."The scope of the projects is also not known," the Chief Minister said.

She said that it was apprehended that the remodeling of the Hemavathy project will result in increased drawl of water by Karnataka and expansion of their ayacut (area served by an irrigation project) to more than what has been allocated by the tribunal will affect the natural flow of the river and consequently severely hit the irrigation interests of Tamil Nadu."These schemes proposed by the government of Karnataka are against the final order of the Cauvery Water Disputes Tribunal," Jayalalithaa said.

Jayalalithaa requested the Prime Minister to immediately form the Cauvery Management Board and the Cauvery Water Regulation Committee.